[gtkmm] cannot handle x events

[koray seremet <ciwius yahoo com>]

when i try to execute the code given in the gtkmm book
section x event signals,nothing  happens.
how do i handle this button press event?

the code is :

bool on_button_press(GdkEventButton* event);
Gtk::Button button("label");
button.signal_button_press_event().connect(
sigc::ptr_fun(&on_button_press) );




	
		
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